Update libqtappfw SRCREV after changes to support voice settings ui

Update libqtappfw SRCREV after changes to support voice settings ui

We include these:
72eb23f fix parsing for all events, overloading for specific needs
21bba7d fix parsing event payload in presence of '\n' chars, and include signal emit for voice status and cbl changes.
9f3896c voice: register for all vshl events on start up
0ff12f7 voice: remove vshl-capabilities dependencies
c4e2933 Add steering wheel events
d56ec00 Add units and timestamp to signal-composer signal
3cd5fe3 Add initial signal-composer support
16c4429 voice: add status events to VshlCoreVoiceMessages

Bug-AGL: SPEC-3060

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Change-Id: If2a5ba6292de4d7a833d4e67e651a4ad32a3849e
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>